JP2018538145A - Strand / pipe extrusion press or metal strand extrusion press - Google Patents

Abstract

  The present invention comprises a press frame comprising a cylinder bar and a counter bar coupled to the cylinder bar, and a movable block receiver holder (7) for supporting the block receiver (8) and movable within the press frame. A plunger traverse (6) is provided, and a master cylinder or a press cylinder is disposed in the cylinder bar (2). The master cylinder or the press cylinder includes a press plunger (18) in the cylinder housing (9). Compensation container (15) which accommodates the press piston (11) provided and supplies hydraulic oil to the press piston (11) by a slide plate (28) provided in the central linkage (19) in the cylinder housing (9) Is attached to the cylinder housing (9) from the compensation container (15). Of the transition portion, the filling valve comprising a lid-shaped valve cone (20) (21) is formed, to a strand pipe extrusion press or a metal strand extrusion press (1). In order to achieve a simplified operating and construction scheme, the central linkage (19) is formed as a sliding guide for the slide plate (28) cut off from the press piston (11), the slide plate (28) being At least two slide rods extending radially with respect to the central linkage (19), fixed on the rear end of the press piston (11) on the one hand and fixed on the slide plate (28) on the other hand (27) fixed at the end spaced apart from the upper press piston (11), the central linkage (19) is coupled with the operating drive (17), which is arranged outside the compensation container (15) Has been.

Description

  The present invention includes a press frame including a cylinder bar and a counter bar coupled to the cylinder bar, and a movable block receiver holder for supporting the block receiver and a movable plunger traverse are provided in the press frame. A master cylinder or press cylinder is disposed in the cylinder bar, and the master cylinder or press cylinder accommodates a press piston having a press plunger at its front end supported by a plunger traverse in the cylinder housing. A compensation container for supplying hydraulic oil to the press piston by a slide plate provided in the central linkage is attached in the housing. The annular cross-section adapted to the inner diameter had to release the open function, the filling valve comprising a lid-like valve cone is formed, to a strand pipe extrusion press or a metal strand extrusion press.

  Such a metal strand extrusion press, in which a counter bar comprising a tool, usually a pressure plate, a die holder and a die, is connected to a cylinder bar via a tension rod and a pressure support, is generally described in WO 2013 064 251. It is known by the issue pamphlet. A filling valve integrated in the center of the cylinder housing of the master cylinder provides a large annular surface, through which oil flows from the compensation vessel into the pressure chamber after the press piston without great resistance, and the press piston On the other hand, when the movement is switched, it can flow into the compensation container. That is, the oil is moved back and forth between the compensation cylinder and the cylinder housing during the operation of the metal strand extrusion press. Accordingly, the press piston guided in the cylinder housing of the master cylinder, in which the linkage supporting the slide plate is fixed, is advanced or retracted by the oil supply from the compensation container. The amount of additional hydraulic oil still needed that can occur after feeding the press piston and block receiver holder to press the loaded block into a strand press product is either a tank or other if the filling is closed It can be introduced from the pressure means supply means into the pressure chamber of the cylinder housing after the press piston. In this case, the necessary folding volume can be reduced by interposing the tank.

  The filling valve of this known metal strand extrusion press surrounds the moving bush after the valve cone in the pressing direction, with a filling valve cover arranged in the central linkage through a collar-like moving bush and formed as a valve cone. Depending on the side of the piston subjected to the action of hydraulic fluid, the cylinder piston of the annular cylinder brings the moving bush and thus the valve cone to the closed or open position. The action on the cylinder piston requires a pressure chamber with corresponding pressure means lines and sealing means located before and after it. An annular cylinder in which the cylinder piston is incorporated in the mechanical unit is subject to some manufacturing costs of the required functional elements and is not freely accessible during maintenance work, for example when replacing the seal.

International Publication No. 2013 064 251 Pamphlet

  The problem underlying the present invention is that in a general metal strand extrusion press, the functional system and the structural system of the filling valve integrated between the master cylinder and the compensation tank while maintaining the proven filling valve principle, In particular, simplifying hydraulic and electrical control requirements and manufacturing and maintenance costs.

  This object is achieved according to the invention in that the central linkage is formed as a sliding guide for a slide plate separated from the press piston, the slide plate extending radially spaced from the central linkage, One is fixed at the rear end of the press piston, and the other is fixed at the end spaced from the press piston on at least two slide rods fixed to the slide plate, and the central linkage is coupled to the operating drive. The operating drive is located outside the compensation vessel and is solved by lifting the valve cone from its seat in the filling valve or pulling it back to the valve seat during operation. The central linkage only has a valve cone threaded in front of it and is no longer used to transfer the movement of the press piston to the slide plate that moves with it. This is rather taken over by both slide rods, and the slide plate slides back and forth over the central linkage. The actuating drive, preferably a hydraulic transfer cylinder, can be easily flanged to the rear wall of the compensation container according to an advantageous embodiment of the invention. The moving cylinder is freely accessible from the outside without being obstructed and includes an annular cylinder integrated in the transition from the compensation cylinder to the press cylinder, including a moving bush for the valve cone, for the annular cylinder. It is unnecessary as well as the necessary pressure oil line and sealing means.

  It is proposed according to the invention that the slide rod is fixed to the press piston and the slide plate by means of a threaded joint. For this reason, since the slide rod is provided with a threaded pin at both ends thereof, one threaded pin can be screwed into the threaded hole of the press piston, and the other threaded pin protruding from the slide plate. The nut can be screwed. Instead of threaded joints, other comparable fixing types or fixing means can also be provided. To guide and seal, the slide rod slides within the plug bushes, which are inserted into the rear cylinder housing wall adjacent the master cylinder compensation vessel.

  In a preferred configuration of the invention, a bushing is provided which is formed as a valve seat and is inserted so as to seal into a through hole in the rear wall of the cylinder housing. When the valve cone is lifted from its valve seat, the adapted large annular cross-section of the bushing is free in the transition to the cylinder housing, through which the strand-pipe extrusion press or metal strand extrusion presses. During the operation of the press, the hydraulic fluid can always be moved back and forth without great resistance.

  According to the proposal of the present invention, a narrow seal and a guide unit, which is composed of an outer ring and an inner ring spaced from the outer ring, are arranged in the bush, and the outer ring engages with an annular groove of the bush. If the inner ring surrounds the central linkage in the form of a sleeve, this free annular cross section is not compromised for the operation of the filling valve. Thereby, the central linkage is arranged with a two-point bearing and a two-point guide, ie on the one hand in the rear wall of the compensation container and on the other hand in the seal in the valve seat bush and in the sleeve-like inner ring of the guide unit. be able to.

  Further features and details of the invention can be seen from the dependent claims and the following description of the embodiments illustrated in the drawings.

Perspective view of the press frame with plunger traverse and block receiver holder inside, as details of a strand / pipe extrusion press or metal strand extrusion press Partially sectioned view of the rear end of a strand-pipe extrusion press or metal strand extrusion press, with cylinder dome and plunger traverse and block receiver holder not shown

  Of a strand pipe extrusion press or a metal strand extrusion press 1, FIG. 1 shows a basic frame substantially. This base frame is fixed to this cylinder bar 2 via a tension bar 3 and a counter bar 4 which is not shown here and is only suggested at 4 at the end of the tension rod 3. Consists of. Furthermore, a pressure support 5 contributes to the frictional engagement of these parts, and these pressure supports surround the tension rod 3 between the cylinder bar 2 and the counter bar 4. In addition, the pressure support 5 is used to guide and accommodate a movable plunger traverse 6 and a movable block receiver carrier 7 in the base frame. A block receiver holder comprising a block receiver or recipient 8 is a plunger traverse 6 that supports the tip of a press piston 11 guided by a positive pressure bearing means 10 (see FIG. 2) in a cylinder housing 9 of the master cylinder or press cylinder. Similarly to this, in this embodiment, it is moved in the pressing direction 14 by the electric motors 12 and 13, particularly the servo motor.

  Such electric motors 12 and 13 are provided on the respective vertical axis sides of the block receiver holder 7 and the plunger traverse 6. In order to transmit or introduce the movement, the pinions of the electric motors 12 and 13 mesh with the rack. Optionally, the strand and pipe extrusion press 1 can be equipped with known side cylinders and receiver moving cylinders that are hydraulically operated instead of being equipped with electric motors for movement and feed movement of the plunger traverse and block receiver holder 7. it can. For the compression and pressing of the blocks loaded into the block receiver 8, the press piston 11 is provided with a press plunger 18. A compensation container 15 is flanged to the rear end of the cylinder housing 9, and an operation driving device 17 formed as a hydraulic moving cylinder is flanged to the end wall or the rear wall 16.

  As can be read from FIG. 2, the operating drive 17 acts on the central linkage, but on this central linkage, it is integrated into the transition from the compensation vessel 15 to the cylinder housing 9 of the master cylinder or press cylinder. The valve cone 20 of a large area of the filling valve 21 arranged in this manner is screwed to the front end. Furthermore, the filling valve 21 has a bush 23 formed with a valve seat 22 for the valve cone 20 inserted so as to be sealed in a through hole in the rear wall of the cylinder housing 9. In this embodiment, there is further provided a seal and guide unit disposed substantially at the center of the bush 23 having an outer ring 24 and an inner ring 25 spaced from the outer ring, and the outer ring 24 is engaged with an annular groove of the bush 23. The inner ring 25 surrounds the central linkage 19 in a sleeve shape. The central linkage 19 is guided to slide in a bearing bush 26 in the rear wall 16 of the compensation container 15 except that it is sealed in a sleeve-like inner ring 25.

  At least two slide rods 27 extend parallel to and spaced from the central linkage 19, and a slide plate 28 guided to slide on the central linkage 19 is arranged at the rear end of the slide rods. It is fixed by a nut 29 screwed onto a screw snow pin protruding from the slide plate 28. The front ends of both slide rods 27 are screwed into the press piston 11 with threaded pins. During the movement of the press piston 11, the slide rod 27 that entrains the slide plate 28 is guided by a plug bush 30 inserted so as to seal the rear wall of the press cylinder 9.

  When acting on the operating drive 17, the central linkage 19 moves in the pressing direction 14, thereby causing the valve cone 20 to float from its valve seat 22, indicated by a solid line, to an open position indicated by a broken line, In this open position, the valve cone 20 is immersed in the cavity 31 of the press piston 11. In this open position of the filling valve 21, a large through-flow cross-section is provided via the cross-section of the bushing 23 or the open cross-section between the outer ring and the inner rings 24, 25, through which the hydraulic oil is supplied. It is possible to flow from the compensation container 15 into the pressure chamber of the cylinder housing 9 after the press piston 11 without great resistance and vice versa. This is due to the sliding movement of the plunger traverse 6 and / or the block receiver holder 7 in the pressing direction 14, i.e. the movement, i.e. the slide plate 28 which moves with the press piston 11. Until the hydraulic oil is discharged through the open filling valve 21.

  For the next press, the filling valve 21 is closed and a press load is applied by supplying hydraulic oil from a tank or the like (not shown) to the pressure chamber after the press piston 11. Since the filling valve 21 is closed, a further amount of hydraulic oil is shown from the compensation container 15 by means of a slide plate 28 which is followed by a slide rod 27 together with a press piston 11 which moves further in the pressing direction 14. It is discharged to the tank that is not.

  In preparation for a new loading and pressing process, during the reversing movement of the press piston 11, the hydraulic oil flows back to the compensation container 15 via the filling valve 21 which is then opened again by the operating drive 17. It can be seen that due to the backward movement of the press piston 11, the drive devices (electric motor or moving cylinder) of the plunger traverse 6 and the block receiver holder 7 are activated accordingly.

DESCRIPTION OF SYMBOLS 1 Strand pipe extrusion press or metal strand extrusion press 2 Cylinder bar 3 Tension rod 4 Counter bar 5 Pressurization support 6 Plunger traverse 7 Block receiver holder 8 Receiver / recipient 9 Cylinder housing 10 Positive pressure type bearing means 11 Press piston 12 Electricity Motor 13 Electric motor 14 Press direction 15 Compensation container 16 End wall / rear wall 17 Operation drive / moving cylinder 18 Press plunger 19 Central linkage 20 Valve cone 21 Filling valve 22 Valve seat 23 Bush 24 Outer ring 25 Inner ring 26 Bearing bush 27 Slide rod 28 Slide plate 29 Nut 30 Plug bush 31 Space

Claims (5)

A movable frame receiver holder (7) for supporting a block receiver (8), comprising a press frame comprising a cylinder bar (2) and a counter bar (4) coupled to the cylinder bar; A movable plunger traverse (6) is provided, and a master cylinder or press cylinder is disposed in the cylinder bar (2), and the master cylinder or press cylinder is disposed in the cylinder housing (9). The press piston (11) provided with a press plunger (18) at its front end supported by) is accommodated in the cylinder housing (9) by means of a slide plate (28) provided in the central linkage (19). Compensation container (15) for supplying hydraulic oil to (11) A lid-like valve that is attached and releases an annular cross section adapted to a large inner diameter in the transition to the cylinder housing (9) in the transition from the compensation vessel (15) to the cylinder housing (9) with an opening function In a strand-pipe extrusion press or a metal strand extrusion press (1) in which a filling valve (21) comprising a cone (20) is formed,
A central linkage (19) is formed as a sliding guide for the slide plate (28) separated from the press piston (11), the slide plate (28) being radially spaced with respect to the central linkage (19). Extended on the one hand, fixed at the rear end of the press piston (11) and on the other hand separated from the press piston (11) on at least two slide rods (27) fixed to the slide plate (28) Secured to the end, the central linkage (19) is coupled to the operating drive (17), which is placed outside the compensation vessel (15) and in operation the valve cone (20) is filled with the filling valve (21 A strand-pipe extrusion press characterized in that it is lifted from its valve seat (22) in) or pulled back to the valve seat (22).   The strand-pipe extrusion press according to claim 1, characterized in that the slide rod (27) is fixed to the press piston (11) and the slide plate (28) by means of a threaded joint.   3. A bushing (23) formed as a valve seat (22) and inserted so as to seal into a through hole in the rear wall of the cylinder housing (9). The strand-pipe extrusion press described in 1.   In the bush (23), a seal and a guide unit having a narrow width with respect to the bush (23), which includes an outer ring (24) and an inner ring (25) spaced apart from the outer ring, are disposed. 4. The strand-pipe extrusion press according to claim 3, wherein the inner ring (25) is engaged with the annular groove (23) and surrounds the central linkage (19) in a sleeve shape.   The strand pipe according to any one of claims 1 to 4, characterized in that the operating drive (17) of the central linkage (19) is flanged to the rear wall of the compensation vessel (15). Extrusion press.

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